The brewery was established in the historical land of Nara where, according to Japanese mythology, the history of human life began. And it is believed that the god of sake was enshrined at at the local Shinto shrine of Omiwa Jinja. This shrine is located at the bottom of the sacred mountain of Miwayama, known by the locals as Mimuroyama, where the brewery derived its name. The brewery took its name Mimuro and added Sugi, the Japanese word for cedar, which they believe embodies part of the sake god who resides in the mountain.

The brewery has deep ties to the spiritual history of Miwayama and started over 350 years ago to brew sake for Japan's oldest shrine. Since ancient times to present day, it is believed that sake was brewed by the blessing and power of the god. Today this brewery is considered the oldest surviving "temple sake". The ties of the brewery to the shrine and mountain brings a significance to the product; it is linking the power of god to human beings. Today, the brewery continues stays faithful to its process and takes the utmost care in each step of the production by continuing to hand craft sake from local rice and water that was blessed by the god of sake.